Update README.md

README.md

@@ -90,4 +90,4 @@ The list of permissive licenses used in dataset could be found here.
 We used star-pii model to filter out personal info.
 
 ## Opt-out
-If you want your data to be removed from dataset, or have any other questions, please reach out to Sergey Titov<sergey.titov@jetbrains.com>
+If you want your data to be removed from dataset, or have any other questions, please reach out to Sergey Titov: <sergey.titov@jetbrains.com>